A Chinese iron red dish decorated with goldfish and bats, Daoguang mark and probably of the period

矾红描金五蝠金鱼碟, 道光篆书六字款, 或为道光时期

the dish painted in iron-red enamel and gilt, a 'Shou' character surrounded by five bats band to the interior, the rim decorated with ruyi lappets, the sides incised with crashing waves and painted with eight goldfish, the base with iron-red six character Daoguang mark

For pieces with similar six character iron-red seal marks drawn in an angular style see S. Marchant and Son, 19th century Mark and Period Porcelain, 1991 nos 46-49 

碟心绘有 "寿" 字, 五蝠围绕, 碟沿有如意纹, 碟身刻有海浪纹暗花, 其上有八条金鱼, 底部有矾红 "大清道光年制" 篆书款

类似有矾红六字款, 并且书写时用笔带棱角风格的瓷器, 可见于S.Marchant & Son 著: Exhibition of Nineteenth Century Mark and Period Porcelain (《19世纪瓷器及印款展览》), 1991年, 第46-49件。